Support for concrete forms.



o. M. MARKHAM lSUPPORT FOR CONCRETE FORMS. I

i APPLICATION FILED JAN. 30, 1909. l v

Patented June 7,1910.

#PLQ/@Mig @mr/; ,Marij/2am ,d M #50g/4M C. M. MARKHAM. SUPPRT PORCONCRETE POEMS. APPLICATION FILED 31111.30, 1909.

Patented June 7, 1910."

2 SHEETS-SHEET 2.

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'UNirnD srnrns rranr oracion.

CHARLES m. MARKHAM, or cnicaed'intmois.

SUPPORT FOR CONCRETE FORMS.

` 960,657; spenen of teem raient. Patented June fi, Ai910.

Application sied January so, isos. sentira. 475.245.

To altwhom tit may co'xwcm vention for loekin the supporting niem- -Beit known that I, CHARLES M'. MAnK- bers, mentioned in t e description ofFig. 4, HAM, acitizen of the United States, residin vertical position.Fig. 6 is a sectional deing at Chicago, county of Cook, and State tailof a portion of the member Shown in 1 5 of Illinois, haveinventedcertain new an Fig. 5, an Fig. 7 is a detail rspectiveof 60'useful Improvements in Supports for Qonone of the members engaging il);lower pori crete Forms, o which the allowing is a tions of the supportinmembers mentioned speCicatiOn. in the descriptions of i'gs. 4. and 5.

My invention relates to forms for concrete ,Referring now 4to thedrawings 1 indiconstruction and more specifically to supcates an uprightor timber. of any suitable 65 ports .for such'as are used in the.4concrete dimensions and referably square in. cross construction offloors and floor vbeariiS or section, upon which is supported theessengirders, s tial parts' of -my device. In 'order to facilV Theobject of my invention is toprovnie Y tate exact vertical adjustment ofsaid lipa form su ort of the character mentioned v y right wedgs 2 areprovided at the lower i79- which wil e of such improvedconstrucextremity 4 ereof upon which the same rests.v tion as to beadjustable, a aptin'g vthe same -to be used in theisupport o a' orm fora Resting upon, andv snugly fitting theupper 'concrete der an jcrosssectional dimenend portion `of said upright '1 is a cap 3, preferably ocast metal. Said capis-cnii-l 'sions wy 1n ordina Frange and also in thesupport of a forni for a girder with diverging sides disposed at anyangle.

A further object 'of my invention is to j provide a. tform support ofthe character mentioned', the joist supporting portions of 5; Projectingfrom a preferablyformed "80' which'will be oi such construction as to beintegrally with the ce portio'nfrV aiehoriadapted to be verticallyadjustable, thereby zontally disposedzilinv armsl'fofanylsuit-- fobviatihg the necessity, in jacking ip of the lable length. 8 indicate*4ace rods extending lioor joists, of wedges and other a ditional betweenand preferabl formed integrally timbers as is the means ordinarilyemployed with the extremities o the arms 7 and the 85 to effect such purose. cap portion 6. Resting' uponA said ca 3 i A still :further dbjectis to provide aform and arms 7 is an'elongatedtimberan 'on support as-inentiomdl lich will be strong and durable, com aratively simple ofconstruction, hence o low cost to manufacture. Other objects will appearhereinafter. 2. With these objects in view my invention l, consists in'a form sipport characterized as i above Axiientione'd an 1n certaindetails of 40 eonst-ructionand arran ement of arts all as willbe'hereinafter y set fort and 'par- Aticiilarly pointed out in theclaims. 4 [M invention will bcmore' readily under. sto xby Yreference tothe accompanying Jifidsrawings formin `fa part of this specificationzandi'nwhi Figure 1 is a fr nt elevation of. my device initspreferred form, illustrating its applilk cation Fig. 2 is a sideelevation thereof. Fig. v3 is va top plan view thereof detached.l i Fig;4' is a detail 'erspective of one of the l guides of the mem embodiedyin my device for supporting the door joists an the sides of the rlerorm..' Fig. 5 is a detail 1 55 perspective ofthe means embodied in myini cap pro er 4, the elongate pprtionsof brace rods` 5 ependinv from'eac :of-the corner of the latter, an an encircling band .6provided atthe lower extremity o said portions timber 9 r`ests the `meniber .10 ofthe' girder -orm, lthe timber 9 being slightly longer than the member 10is wi ln or- '9.0 der that said timber 9 may be readily and easilysecured 'in place u on said arms an cap, I preferably iprovi e `thetop"wall 11" of the lat-ter with e ongate slots 12. ABy such provisionnails or'the-like'ma be' driven-"95 through said .timbenand said s otsintothe upper extremity of the upright 1 suehbeng the preferred means.employed or saidtimber inposition. i L'. i f' p A In order to upport Vthe-side 'members-13 of the girder crmarid the extremitiesof the floorjoists 14,sinii1ar elongutemembers or bars 15, und-preferably.rectangularin cross section are provided. Said mem rs 1-5' are-slid'ab ymounted in ieotanglflfii' ots 105 16 `provided in similarly formed 17,the latter being detach ly to the arms 7 of the cap 3, by lneuns'bfne"gular slot form' .arms 18 rearwardly gecting from eit er thereof, theslots-19 H0 prised' of the rectangular upper portion or voxan 'tac ed,or be slid horizontally to formed by said arms being adaptedto snuglyreceiyesaid arms 7. By such construction the members 17 may either'beelevated from en gement with the arm 7 y and thus be dethe extremitlesthereof to 'efect disengagement. Theislots'lrareof a width slight ygreaten liquely or at an angle. The advanof which are ivtally securedto'the cap portion 4 by t eir being looped around an eye 22 provided' uponand projecting from -channels 25, tapering inform,'.formed by.

said cap. Loosely resting/.upon each of saidL rods is a washer 23,and.threaded vthereon a nut'24. Said rods are adapted torcst insubstantially parallelly extending ears 26 fori guard wadly projectingfrom either of said mem- -berS 17, the washers 23'being adapted, whensaid rods are so positioned,jtorest against the extremities 2'( -fofsaidy ears, the same being locked .in engagement therewithby said nuts24, as clearly shown in Fig. 3. To a inst accident-al displacement ofsaid was ers from engagement -with said ears, I provide the end surfaces27 of the latter, upon theouter edges thereof with rojections 28, suchprojections obviously `bers 15 is readily effected thereby a aptingacllitatin such pur o se.- By4 such struction e lateral a justment of tmem-v myl device for use in 'the construction of a .4Q girderofianylwidth. .29lindicate similarl ormed locking devices, the purpose of whic is to -lock sai .members 15 1n vertical position.' Said members29 are adapted to be detachably securedto the arms 7cby means 4'5 ofjhooked portioi1s30Ik rearwardly extending from thebody portion 31 ofsaid members,

'g said hookedportions bein 4adapted, to enin the bi gage said arms asclearly s own in Fig. 2.

' Havin their extremities pivotally secured eatinlower end portion ofthe member 31 are aterally extendin slotted Ymembers 32, the slots 33provide therein extending Qblnuely therethrough. Said slots are adaptewhen s aid devices 29 .are

positioned upon said arms, as shown 1n Fig.

150v posed, the members 15 may be read 1, to receive the lower endportions of themembers 15, said slotsbei slightly-greater than that ofte latter. Because ofv said slots 33 being obliqueilly disy .e e- ,vated.to any, osition but will be locked against vertlca movement in anyposition to which they may be adjusted, 1t being clear that the ed 34`and 35 of said slots will, because of t e weight of said memberspercon-

fthe joists beiner 15 be forced into enga ement with the lateral edgesthereof; there y causing the locklng of said members against` downwardmovement. By such construction, the greater the weight ofthemembers l5or weight -applied thereto, themore secure will be the gripping orclamping thereof,an advanta 'which will be obvious from the following.siring to lower said members 15, it 1s only necessary to slightly raise,as by tapping, the free extremit ,thereof ,will obvious y disengaged andpon de- 32' ofthe members 32,. w'hereupon the am in edges 34 and 35-said members 15 will drop, because of their own vity.

` 36 mdcate threaded rods, the inner end prtions37 thereof being loopedaround an eye 38formed upon and projecting from the cap portion 6.

"1; 39 indicate substantiallyl U-shaped inembers, a perforation 40extending through one ofthe arms of either of said members bein adaptedto loosely receive the rods 36. Said I :membersf3'2 are adapted tosnugly receive, between the parallelly vextending arms there- -'Nuts 41threaded upon said rods 36 adapted toabut the members 39 serve anobvious purpose. In order to insure positive en.- gagement of saidmembers 39 with said members 15 I preferably provide either of thelatter upon the inner edge thereof with a plurality of projecting pins42, the latter being adapted to engage perforations 43 pgyicled in thecontacting surface of named member.

. 44 indicate stops provided at the extremi said.

'of, the lower end'portion of the members 15.4

ties of the rods 36 to prevent displacement of Y i said'members 36.

' Infordento adapt the members 15`to sup-4 port the extremities of thejoists 14 the up r end portions thereof are provided with ong'itudmallyextending angular, arms 45' detachablysecured thereto by means of bolts46 .extending therethrough and nuts threaded upon said bolts, theextremities ofV adapted to rest in the slots formed by said arms and theend portions of said members 15, as clearly shown in Fig.. 2. IThecontacting surface of the lower end portion of either of said arms 45 isprovided with a projecting, transversely extending ridge 48, the samebeing adapted to be snugly received in a 'correspond' ly sh'aped recess49 provided in either o e members 15 for t e reception of the same.

By such. construction a rigid securement of the arm 45 to the member 15is-eifected. f In order that such arms 45 Ymay be adjusted' in differentpositions upon said members 15 each of the latter is provided with apluralwi th.

' means of bo givin the three necessary adjustments refor locking saidbars in any elevated posi- 7n qiuire to adapt bars l5 to use ondifferent tion' against downward movement, elongate sizes and shapes ofgirders. Moreover, by .rods ivotelly secured to said cap, nuts drawingthe upper ends of bars 15 to ether threa led upon said rods adapted' toengage by'means o'nuts 23, and forcing their ower said verticallyslotted members, and a sccends apart, b means of nuts 41, intense ondpair of rods and nuts threaded thereon ressure may e exertednon theformsides, adaptedf to adjust the angularity of said if desired. -vbars, s bstantially as'and for'the purpose While I have shown what Ideem-to be the speciiie 4pref/arable form ofnxy invention, I do not 4,Inilm apparatus 0f the class described, wish to be limited thereto, asthere might the'combination with an upright, of a 'recgo be many changesmade irPthe details of contangular"cap Adetaohably i mounted thereon,struction and arrangement ofparts without depending bracina means forSaid cap, honideparting from the-spirit of my invention. zontally disposalinin bars projecting And though I have designedl my device with fromandi formed integra ly with said' cap, special reference to thesupporting of girder integral braces for saidfarms, vertically slot- 55forms, I may use the same i any other C011- ted members slidablyandfdetachablymountnection to which it is applicable ed. upon Sialdarms, elongate bgrsvslldgbly Having described my invention Whelmountedinthe slot-s-in'said mmbers,-an claim as new and desire to secure byLetters g'nl'nr inist-gent, forming arms longitudinally l Patent is: iadjustable uponthe upper end rtion of on l. In an apparatus of' theclass described, said bars,'slotted means in detac ableioonthecombination with an upright, of a Cap nection. with said first mentionedarms detachablymounted thereon, horizontally. adapted for ,lockingsnidbam ingn: ele. disposed 'alininv arms projecting from oppovatedposition, elongate :rods pivotallvy sesite sides of said cap, verticallyslotted memcured to said cap, nuts threaded upon said bers slidablymounted upon said arms, elonrods .adapted to enga e said"vertically'`slotate bars slidably mounted in the slots in ted'members, asecon pairof rods an Anuts said members, means whereby said bars Will threadedthereon in connection the be normally locked against downward movclowerend portion 0j said bars, subst tially ment, means, in'connection withsaid slotted as and'for the purpose specied. l 10o members adapted tolock the same against 5. In a deviceo the class d cribed, thev lateralmovement upon said arms, and means combination with Van upright, "ofhorizonin connection with '-the lower. end portion tally disposed armsprojecting from said upof said b ars wher-cbj,v the angulardisposiright, a pair of members' slidably mounted tiontof the latter maybe regulated, substunon said nrm s and provided 'with vertically 105tially-as and for the purpose specified. l disposed slots; pressure iarms -extending 2. In an apparatus of ihe'cluss dcscribcd, l throughsaid slots, locking. members slidthe combination with an'upriglu, of ncup ably mounted on said arms adjacent said detachably mounted thereon.horizontally i slidably mounted members and comprising disposed aliningarms projecting from opu portion rcoesed to receive said hon'zonta lloposite sides of sail cup, verticalliv slotted arms and a portion'pivotally connected to members slidably and deiachably mounted thefirst said portion and provided with a upon said arms, elongate barsslidably slot to receive said pressure arms, and means mounted in slotsin said members, obliqucly for adjusting the first said members on saislotted means in detnchul'ile connection with i horizontal arms andmeans for. spreading the 1.12! said bars adapted normally to loclt saidours l lower ends 'of said pressure arms, substanagainst downwardmovement, adjustable tially as described.' means in connection with saidvertically (3. In a device of the class'described, the slotted membersadapted to lot-lr the same combination with an upright,of horizontallyagainst lateral movement. und menus in opdisposed arms projecting fromsaid upl2 erative connection with the lower cnd porright, membersslidably mounted on Vsaid tion of said elongate oars for adjusting thehorizontal arms and provided with vertiangularity thereof, substantiallyas and for l cally disposed slots, means for adjusting said the purposespecified. members toward orfrom each other, pres- In an apparatus oftheclass described, sure arms extending through said slots, the combinationw`th an upright, of a cap means for spreading the lower. ends of saiddetachably mounted thereon, horizontally pressure arms, a second memberslidably disposed alining arms projecting from op, mounted on saidhorizontal varms adjacent posite sides of said cup, braces for saidarms, each of the first said members and' a porp vertically slottedmembers slidably and dction pivotally connected thereto and extend; 13

It will be seen that by means of nutslfi` and 41 on rods 20, and 36, thebars 15 may be adjusted an ularly and laterally, and by ts 46, adjustedvertically, thus tachably mounted upon said arms, elongate bars slidablymounted in the slots in said members, joist seats formedfin Vthe upperend portions of said bars, means adapted ing beneath the first- ,saidmembers, said 'orname to this specification in the presence of tionsbelilng provlilded gvithlots exth ing two subscribing witnesses. diagonatheret lrou to receive sai ressurearmsy whereby sagid arms may be zad-CHARLES M ily raised but seurely locked against down- Witnesses: wardmovement, substantially' ais-described. JANET E. HOGAN,

Ip testimony whereof I have signed my HELEN F. Linus.

